JP5095467B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins, panty liners, incontinence pads, disposable paper diapers for absorbing menstrual blood and vaginal discharge, and in particular, absorption that prevents falling of three-dimensional gathers and improves fit. It relates to sex goods.

  Conventionally, as an absorbent article such as a panty liner, sanitary napkin, incontinence pad, disposable paper diaper, etc., a liquid-impervious back sheet such as a polyethylene sheet or a polyethylene sheet-laminated nonwoven fabric and a liquid-permeable liquid such as a nonwoven fabric or a liquid-permeable plastic sheet. There is known one in which an absorbent body made of cotton-like pulp or the like is interposed between the conductive top sheet.

  Numerous improvements have been made on this type of absorbent article, and various means for preventing leakage of body fluids have been taken. As one of these body fluid leakage prevention means, there is one provided with a three-dimensional gather for preventing side leakage on both sides on the surface side. For example, in Patent Document 1 below, as in the sanitary napkin 50 shown in FIG. 7, side nonwoven fabrics 52 are disposed on both sides of the surface side, and one or a plurality of elastic elastic members are disposed inside the side nonwoven fabric 52. By arranging 53 and 53 in an extended state, three-dimensional gathers 54 and 54 are formed which stand on the surface side by the contraction force of the elastic members 53 and 53.

In addition, in view of problems such as the fact that the three-dimensional gather 54 falls inside or outside at the time of wearing, and the effect of blocking menstrual blood and urine cannot be exhibited, in Patent Document 2 below, in order to prevent the three-dimensional gather from falling, As shown in FIG. 8, a liquid-permeable top sheet 61, a liquid-impermeable back sheet 62, an absorbent main body 64 composed of an absorbent body 63 disposed between the two sheets, and an absorbent main body 64 A flap 65 extending outward from both side edges in the longitudinal direction of the lower part and folded back on the absorbent main body, an exterior sheet 66 extending outward from both side edges in the longitudinal direction of the lower part of the absorbent main body, and an absorbent main body of the flap 65 64, and a side sheet 67 which is disposed from the side edge portion on the side of the outer sheet 64 to the side edge portion where the exterior sheet 66 extends and is joined at both side edge portions. Stretch The elastic member 68 is disposed, both ends in the longitudinal direction are bonded and fixed on the absorbent main body, and the central region is a free edge. The side sheet 67 has a branch point with the exterior sheet 66, a flap 65, An absorbent article 60 in which a stretchable elastic member 69 is disposed between the two branch points is disclosed.
JP 2003-24376 A Japanese Patent Laid-Open No. 10-290817

  Certainly, in the case of the absorbent article according to Patent Document 2, the cross-sectional shape of the three-dimensional gather is a hollow triangle, which is strong against falling. However, since the side sheet 67 is located outside and is based on the end portion of the exterior sheet 66, the side sheet 67 does not function as a support when the exterior sheet itself is bent or attached in a folded state. There was a problem that the fall of the three-dimensional gather could not be effectively prevented.

  In addition, if a large amount of body fluid is discharged and flows through the surface to reach the upright part of the three-dimensional gather, the problem that this body fluid flows along the longitudinal direction, causing side leakage and exudation has been solved. There wasn't.

  Therefore, the main problem of the present invention is to prevent the fall of the three-dimensional gathering and improve the fit, and in the three-dimensional gather, the body fluid is quickly drawn into the absorbent body without flowing in the longitudinal direction of the absorbent article, and leakage and bleeding are caused. An object of the present invention is to provide an absorbent article that is prevented from being taken out.

As the present invention according to claim 1 for solving the above-mentioned problem, an absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and the three-dimensional gathers are formed on both sides of the surface side. In the sex goods,
The three-dimensional gather is erected by a first elastic elastic member disposed in the longitudinal direction of the absorbent article, and with respect to this standing portion, the longitudinal direction of the absorbent article is spaced apart, and the width direction of the absorbent article and the rise of the / or with respect to the width direction of the plurality which are arranged at an inclination oblique angle second resilient and elastic members at predetermined intervals in the longitudinal direction of the absorbent article, along with showing the upright inwardly, generally absorbed An absorbent article characterized by providing a streak-like standing portion that stands on the inner side at an interval between absorbent articles, characterized by providing a streaky standing portion along the width direction of the absorbent article. Provided.

In the invention described in claim 1, the upright wall portion of the standing gathers, at intervals in the longitudinal direction of the absorbent article is disposed with an inclination oblique angle with respect to the width direction or the width direction of the absorbent article In addition, the rising of the plurality of second elastic elastic members shows standing on the inner side at a predetermined interval in the longitudinal direction of the absorbent article, and is provided with a streak-like standing portion generally along the width direction of the absorbent article. It is.

  Therefore, since the linear upright part formed by the second elastic elastic member supports the three-dimensional gather, it is possible to effectively prevent the three-dimensional gather from falling down and improve the fit.

  In addition, when there is a body fluid that has flowed and stopped to the three-dimensional gather, the streak-like standing portion prevents the body fluid from flowing in the longitudinal direction of the absorbent article and induces it to return to the absorber side again. Therefore, it can be quickly drawn into the absorber to prevent leakage and bleeding.

  According to a second aspect of the present invention, the second elastic elastic member is configured such that the elastic elastic member located on the front side is inclined toward the body fluid discharging part and the elastic elastic member located on the rear side with respect to the body fluid discharging part. The absorbent article according to claim 1, wherein the absorbent article is inclined toward the body fluid discharge portion side.

  In the second aspect of the present invention, the body fluid is discharged to the center side of the absorber (body fluid discharge) by inclining the direction of the stair-like standing portion formed in the standing portion of the three-dimensional gather toward the body fluid discharge portion side. Part).

  As the present invention according to claim 3, the second elastic stretchable member is a separate gathered second sheet in which an elastic stretchable member is interposed between two nonwoven fabric sheets, and is bonded to the standing portion of the three-dimensional gather. Thus, an absorbent article according to any one of claims 1 and 2 is provided.

  In the invention of claim 3, the second elastic stretchable member is formed by attaching a separate gather second sheet in which an elastic stretchable member is interposed between two nonwoven fabric sheets to an upright portion of a three-dimensional gather. They are arranged. Since the first elastic elastic member and the second elastic elastic member arranged in the three-dimensional gather are arranged in a direction that intersects substantially orthogonally, the second elastic elastic member is arranged for manufacturing reasons. About a member, the direction arrange | positioned by bonding the separate gather 2nd sheet | seat which interposed the elastic elastic member between the two nonwoven fabric sheets to the standing part of a three-dimensional gather can manufacture easily. Further, by sticking the gather second sheet, the standing part of the three-dimensional gather has a double structure, and urine and menstrual blood are difficult to ooze out.

As the present invention according to claim 4, an inner side of the second gather sheet is interposed between the liquid-permeable top sheet and the absorbent body, and the liquid-permeable top sheet and the second gather sheet are laminated. for the portion, the absorbent article according to claim 3, wherein you have imparted an embossing along the length side direction of the absorbent article from the front surface side is provided.

In the invention according to claim 4, when the inner end of the gather second sheet is firmly fixed, and when the body fluid reaching the three-dimensional gather is returned to the absorber side again by the streak-like standing portion. In order to make the absorbent body quickly absorb, the inner side of the gather second sheet is interposed between the liquid permeable top sheet and the absorbent body, and the laminated portion of the liquid permeable top sheet and the gather second sheet. in contrast, it is obtained by the surface side so as to impart an embossed along the length side direction of the absorbent article.

  As described above in detail, according to the present invention, the three-dimensional gathering is prevented from falling, the fitting property is improved, and in the three-dimensional gather, the body fluid is quickly drawn into the absorbent body without flowing in the longitudinal direction of the absorbent article and leaked. And bleeding can be prevented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a development view of a sanitary napkin 1 according to the present invention, and FIG. 2 is a view taken along the line II-II in FIG.

  The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a liquid-permeable top sheet 3 that allows permeation of menstrual blood, cages, and the like, and an intervening sheet between the sheets 2 and 3. The absorbent body 4 made of cotton-like pulp or synthetic pulp, the crepe paper 5 surrounding the absorbent body 4 for maintaining the shape of the absorbent body 4 and improving the diffusibility, and at least on both sides of the surface side It is mainly composed of a pair of left and right three-dimensional gathers BS and BS provided to protrude from the body fluid discharge part H to the front side in a predetermined section in the front-rear direction. The outer edge portion of the liquid-impermeable back sheet 2 and the liquid-permeable top sheet 3 is joined by an adhesive such as hot melt or an adhesive means such as heat seal, The liquid-impermeable back sheet 2 extending to the side of the absorbent body 4 and the side nonwoven fabric 7 forming the three-dimensional gather BS are bonded by an adhesive such as hot melt or an adhesive means such as heat seal. It is joined.

Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impervious backsheet 2, a sheet material having at least water shielding properties such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used. One or a plurality of adhesive layers (not shown) are formed on the non-use side (outer surface) of the liquid-impermeable back sheet 2 so as to fix the sanitary napkin 1 to the underwear when worn on the body. It has become.

  As the liquid-permeable top sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. As the material fibers constituting the nonwoven fabric, in addition to olefins such as polyethylene or polypropylene, polyesters, polyamides, and other synthetic fibers, regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used. A nonwoven fabric obtained by an appropriate processing method such as a method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable top sheet 3, menstrual blood, venom, etc. (hereinafter collectively referred to as body fluid) are quickly absorbed, and the dry touch property is excellent. It will be a thing.

  The absorbent body 4 is not particularly limited as long as it can absorb and retain bodily fluids. Usually, a fluffy pulp mixed with a water-absorbing polymer powder is preferably used from the viewpoint of the absorption function and cost. The absorbent body 4 is preferably surrounded by crepe paper 5 to maintain its shape.

On the other hand, the width dimension of the liquid-permeable top sheet 3 is slightly longer than the width of the absorbent body 4 as shown in the transverse sectional view of FIG. The three-dimensional gathered BS is a side non-woven fabric 7 different from the liquid-permeable top sheet 3, specifically, prevents permeation of menstrual blood, venom, etc., or increases the feeling of touch. The nonwoven fabric material is subjected to appropriate water repellent treatment or hydrophilic treatment. The side nonwoven fabric 7 can be made of natural fiber, synthetic fiber, regenerated fiber, or the like and formed by an appropriate processing method. Preferably, the side nonwoven fabric 7 eliminates the feeling of stickiness and prevents stuffiness. For this reason, it is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 18 to 23 g / m ² , and silicon-based, paraffin-based, alkylchromic chloride-based water repellents, etc. to reliably prevent the passage of body fluids. A water repellent nonwoven fabric coated with is preferably used.

  As shown in FIG. 2, the side nonwoven fabric 7 has an impermeable liquid in which the base end side portion extends beyond the side edge of the absorber 4 so that the standing base point is in the vicinity of the absorber side edge. Adhering to the back sheet 2 part with an adhesive such as hot melt, the tip side part of the side nonwoven fabric 7 of the standing part is folded back almost double, and both ends in the middle in the height direction inside this double sheet Alternatively, the elastic expansion / contraction member 20 having an appropriate position in the longitudinal direction is disposed, and the elastic expansion / contraction member 21 is disposed at the distal end portion with both ends or an appropriate position in the longitudinal direction being fixed. As a result, three-dimensional gathers BS and BS standing on the surface side are formed while forming pockets P and P with openings inwardly in a cross-sectional shape with the elastic elastic member 20 provided as a bending point. . The elastic elastic members 20 and 21 are elastic members for raising the three-dimensional gather BS and constitute the “first elastic elastic member” in the present invention.

In the sanitary napkin 1, as shown in detail in FIG. 4, in the standing portion of the three-dimensional gather BS, there is a slight gap with respect to the width direction or the width direction of the napkin with an interval in the longitudinal direction of the napkin 1. the inclination angle with and arranged plurality of second elastically stretchable members 9 ... rise of, at a predetermined interval in the longitudinal direction of the napkin 1, along with showing the upright inwardly, generally in the width direction of the napkin 1 The streak-like standing part 10,10 ... along is provided. Here, “inward side” refers to a direction on the side where the absorber 4 is disposed, that is, the inner surface side of the standing wall of the three-dimensional gather BS, with reference to the standing wall surface of the three-dimensional gather BS.

  The upright portion 10 is based on the body fluid discharge portion H, the elastic elastic members 9, 9... Positioned on the front side are inclined toward the body fluid discharge portion H side, and the elastic elastic members 9, 9. It is desirable to be inclined toward the body fluid discharge part H side. That is, even if there is a body fluid that reaches the three-dimensional gather BS, the body fluid flows in the longitudinal direction of the napkin 1 by setting the direction of the upright portions 10, 10. In addition, when returning to the absorber side again, it is guided toward the body fluid discharge portion H as much as possible.

  In order to form the upright portions 10, 10..., The second elastic elastic members 9, 9... Can be directly arranged on the side nonwoven fabric 7, but the first elasticity arranged in the three-dimensional gather BS. The elastic members 20, 21 and the second elastic elastic members 9, 9,... Are arranged in a direction that intersects substantially orthogonally. Because of the need for improvement, as shown in FIG. 5, a separate gather second sheet 6 in which the second elastic stretchable members 9, 9... However, it is desirable to arrange it by sticking it to the standing part of the three-dimensional gather BS. At this time, the elastic elastic members 9, 9... Are positioned vertically, but the upper and lower ends of the second elastic elastic members 9, 9. By setting the side arrangement interval A to be larger than the lower end arrangement interval B, the second elastic elastic members 9, 9... Positioned on the front side are inclined toward the body fluid discharge portion H side with respect to the body fluid discharge portion H. The second elastic elastic members 9, 9... Located on the rear side are arranged to be inclined toward the body fluid discharge portion H side. Here, the upper end side arrangement interval A is set to A ≧ 10 mm, and the lower end side arrangement interval B is set to a smaller value. When the upper end side arrangement interval A is less than 10 mm, it is difficult to form the groove between the upright portions 10, 10. The gather second sheet 6 is desirably a water-repellent nonwoven fabric, similar to the side nonwoven fabric 7.

  Further, the strength of the second elastic stretchable member 9 is approximately 60-90% of the first elastic stretchable member 20, 21 in order to raise the upright portion 10 appropriately and is relatively weak. It is desirable to set to.

  In addition, as the said gather 2nd sheet | seat 6, as FIG. 6 shows, it uses what arrange | positioned all the 2nd elastic expansion-contraction members 9, 9 ... along the width direction of the napkin 1, all vertically. It may be.

  In arranging the gather second sheet 6, as shown in FIG. 3, the upper end side is interposed in the folded portion of the side nonwoven fabric 7, and the lower end side is disposed between the liquid-permeable top sheet 3 and the absorbent body 4. It is desirable to intervene. And it is desirable to give the embossed 8 of the direction which follows the substantially longitudinal direction of the napkin 1 from the surface side with respect to the laminated part of the said liquid-permeable top sheet 3 and the gather 2nd sheet | seat 6. FIG. When such an arrangement mode is adopted, the upper end side of the second gather sheet 6 is not turned over, and the lower end side is firmly fixed by the embossing 8. Further, when the body fluid reaching the three-dimensional gather BS is returned to the absorber 4 side again by the streaky upright portions 10, 10,..., It can be quickly absorbed by the absorber 4.

[Other Embodiments]
(1) In the above embodiment, the present invention has been described by using an example of a three-dimensional gather BS bent in a cross-sectional shape. However, the cross-sectional shape of the three-dimensional gather is arbitrary, and the three-dimensional gather BS standing simply in a straight line However, the same can be applied.
(2) In the above-described embodiment, it is desirable to add a second sheet between the liquid-permeable top sheet 3 and the absorbent body 4 to prevent the absorption rate from being improved and reversing. As the material for the second sheet, it is desirable to use a mesh sheet provided with a large number of uneven embossments, a nonwoven fabric with a high basis weight, particularly an air-through nonwoven fabric.
(3) In the above embodiment, the present invention has been described by using an example of a sanitary napkin. However, the present invention can be similarly applied to disposable paper diapers. In the case of application to paper diapers, in addition to the same effect as in the case of napkins, by raising the three-dimensional gather BS highly, a gap is created between the skin and the absorption surface, and air permeability is improved. It is possible to reduce fog.

It is an expanded view of the sanitary napkin 1 which concerns on this invention. It is the cross-sectional view (II-II line arrow view of FIG. 1). It is an expanded sectional view of solid gather BS. It is the principal part figure which looked at the linear standing part 10 from the front. The gather 2nd sheet | seat 6 is shown, (A) is an expanded state expanded view, (B) is a contracted state figure. The other example of the gather 2nd sheet | seat 6 is shown, (A) is an expanded state expanded view, (B) is a contracted state figure. It is an expanded view which shows the conventional sanitary napkin 50. It is diaper sectional drawing which shows the example of the conventional solid gathers.

  DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious top sheet, 4 ... Absorber, 5 ... Crepe paper, 6 ... Second gather sheet, 7 ... Side nonwoven fabric, 8 ... Emboss, 9 ... 2nd elastic expansion and contraction member, 10 ... Straight upright part, 20 · 21 ... 1st elastic expansion and contraction member, BS ... Solid gather

Claims (4)

In the absorbent article in which the absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and three-dimensional gathers are formed on both sides of the surface side,
The three-dimensional gather is erected by a first elastic elastic member disposed in the longitudinal direction of the absorbent article, and with respect to this standing portion, the longitudinal direction of the absorbent article is spaced apart, and the width direction of the absorbent article and the rise of the / or with respect to the width direction of the plurality which are arranged at an inclination oblique angle second resilient and elastic members at predetermined intervals in the longitudinal direction of the absorbent article, along with showing the upright inwardly, generally absorbed An absorbent article provided with a streak-like standing portion along the width direction of the absorbent article.   The elastic elastic member located on the front side is inclined toward the body fluid discharge part side, and the elastic elastic member located on the rear side is inclined toward the body fluid discharge part side with respect to the body fluid discharge part. The absorbent article of Claim 1 arrange | positioned.   The said 2nd elastic elastic member is arrange | positioned by bonding the separate gather 2nd sheet which interposed the elastic elastic member between the two nonwoven fabric sheets to the standing part of the said three-dimensional gather. The absorbent article according to any one of 2 above. The inner side of the gather second sheet is interposed between the liquid permeable top sheet and the absorber, and absorbs from the surface side with respect to the laminated portion of the liquid permeable top sheet and the gather second sheet. the absorbent article of claim 3, wherein you have imparted an embossing along the length side direction of sex article.

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